Journal Title
Title of Journal: Biol Trace Elem Res
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Abbravation: Biological Trace Element Research
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Authors: Yuan Wang Jing Dong Yi Wang Wei Wei Binbin Song Zhongyan Shan Weiping Teng Jie Chen
Publish Date: 2016/03/31
Volume: 173, Issue: 2, Pages: 465-474
Abstract
Iodine is a significant micronutrient Iodine deficiency IDinduced hypothyroxinemia and hypothyroidism during developmental period can cause cerebellar dysfunction However mechanisms are still unclear Therefore the present research aims to study effects of developmental hypothyroxinemia caused by mild ID and hypothyroidism caused by severe ID or methimazole MMZ on parallel fiber–Purkinje cell PFPC synapses in filial cerebellum Maternal hypothyroxinemia and hypothyroidism models were established in Wistar rats using ID diet and deionized water supplemented with different concentrations of potassium iodide or MMZ water Birth weight and cerebellum weight were measured We also examined PFPC synapses using immunofluorescence and western blot analysis was conducted to investigate the activity of Neurexin1/cerebellin1 Cbln1/glutamate receptor d2 GluD2 tripartite complex Our results showed that hypothyroxinemia and hypothyroidism decreased birth weight and cerebellum weight and reduced the PFPC synapses on postnatal day PN 14 and PN21 Accordingly the mean intensity of vesicular glutamate transporter VGluT1 and Calbindin immunofluorescence was reduced in mild ID severe ID and MMZ groups Moreover maternal hypothyroxinemia and hypothyroidism reduced expression of Neurexin1/Cbln1/GluD2 tripartite complex Our study supports the hypothesis that developmental hypothyroxinemia and hypothyroidism reduce PFPC synapses which may be attributed to the downregulation of Neurexin1/Cbln1/GluD2 tripartite complexJie Chen and Weiping Teng conceived and designed the study Yuan Wang Jing Dong Yi Wang Wei Wei Binbin Song performed the experiments Weiping Teng and Jie Chen obtained funding and ethics approval Yuan Wang Jing Dong Yi Wang Zhongyan Shan and Jie Chen analyzed the data Yuan Wang wrote the article in whole Jing Dong Yi Wang and Jie Chen revised the article
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